A VFR large transport making a 7 mile arc of the sln VOR at 3000' passed in front of an IFR small tr...

Attributes
ACN	171753
Time
Date	199103
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sln
State Reference	KS
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc tower : sln tower : ord
Operator	general aviation : corporate
Make Model Name	Small Transport
Flight Phase	cruise other other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other cruise other
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	171753
Person 2
Affiliation	government : faa
Function	controller : flight data
Qualification	controller : non radar
ASRS Report	172198
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 3000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure other

Narrative:

I was working the sln low sector at ZKC (radar). The WX was marginal VFR. The aircraft in question was on an IFR flight from mkc to sln and was the third aircraft out of 4 for approach at sln following slower aircraft. Small transport X was behind 2 small aircraft's. Small transport X reported the art in sight but could not find preceding aircraft on a visibility approach to runway 17 at sln. One turn in holding was done for spacing. The 2 previous aircraft were on the ground and small transport X was cleared for visibility to runway 17. Small transport X was asked for position and altitude reports to sep fourth aircraft down. Last report to center from small transport X was 4 1/2 mi south of VFR at 3000', and an large transport Y just passed 1/2 mi in front of me. Large transport Y was never seen on radar. Sln tower called me prior to the first aircraft approach to advise him of an large transport Y on 7 mi arc northwest of the VOR at 3000'. First aircraft was issued the traffic. Sln tower never reissued traffic to the center (me) for any of the other aircraft that were inbound. Sln tower did have the inbound estimates and the sequence for all 4 aircraft. This is covered in an LOA that was not adhered to. Supplemental information from acn 172198: we had 1 aircraft on approach (VOR 17) at sln and 3 more over the sln VOR holding. Tower was advised of all 4 aircraft, their intent to make the VOR 17 and their position. Tower advised the radar controller of an large transport on the 7 DME arc northwest of the VOR at 3000' VFR.

Original NASA ASRS Text

Title: A VFR LGT MAKING A 7 MILE ARC OF THE SLN VOR AT 3000' PASSED IN FRONT OF AN IFR SMT HOLDING AT SLN VOR AT 3000'. SEE AND AVOID CONCEPT.

Narrative: I WAS WORKING THE SLN LOW SECTOR AT ZKC (RADAR). THE WX WAS MARGINAL VFR. THE ACFT IN QUESTION WAS ON AN IFR FLT FROM MKC TO SLN AND WAS THE THIRD ACFT OUT OF 4 FOR APCH AT SLN FOLLOWING SLOWER ACFT. SMT X WAS BEHIND 2 SMA'S. SMT X RPTED THE ART IN SIGHT BUT COULD NOT FIND PRECEDING ACFT ON A VIS APCH TO RWY 17 AT SLN. ONE TURN IN HOLDING WAS DONE FOR SPACING. THE 2 PREVIOUS ACFT WERE ON THE GND AND SMT X WAS CLRED FOR VIS TO RWY 17. SMT X WAS ASKED FOR POS AND ALT RPTS TO SEP FOURTH ACFT DOWN. LAST RPT TO CENTER FROM SMT X WAS 4 1/2 MI S OF VFR AT 3000', AND AN LGT Y JUST PASSED 1/2 MI IN FRONT OF ME. LGT Y WAS NEVER SEEN ON RADAR. SLN TWR CALLED ME PRIOR TO THE FIRST ACFT APCH TO ADVISE HIM OF AN LGT Y ON 7 MI ARC NW OF THE VOR AT 3000'. FIRST ACFT WAS ISSUED THE TFC. SLN TWR NEVER REISSUED TFC TO THE CENTER (ME) FOR ANY OF THE OTHER ACFT THAT WERE INBND. SLN TWR DID HAVE THE INBND ESTIMATES AND THE SEQUENCE FOR ALL 4 ACFT. THIS IS COVERED IN AN LOA THAT WAS NOT ADHERED TO. SUPPLEMENTAL INFO FROM ACN 172198: WE HAD 1 ACFT ON APCH (VOR 17) AT SLN AND 3 MORE OVER THE SLN VOR HOLDING. TWR WAS ADVISED OF ALL 4 ACFT, THEIR INTENT TO MAKE THE VOR 17 AND THEIR POS. TWR ADVISED THE RADAR CTLR OF AN LGT ON THE 7 DME ARC NW OF THE VOR AT 3000' VFR.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

A VFR large transport making a 7 mile arc of the sln VOR at 3000' passed in front of an IFR small transport holding at sln VOR at 3000'. See and avoid concept.